From patchwork Wed May 13 09:45:29 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 225982 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.9 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 89C21CA90AF for ; Wed, 13 May 2020 09:56:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6150620575 for ; Wed, 13 May 2020 09:56:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589363808; bh=bJcHkarLkEnaA5oi/4+IBchkLnwTvtlhkr1/AqhbjmI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=Kof4Qh/F+jDTUCcpIbt3fDys1Xu+PAr0WBe+YaN2PbM77/Soa24WbMfJ8S/364eRH VValLwKQHj6lt7p0wWOQnPQxuH86jGley7ZpTFBotgmEkq+nCj87Ix9zGvLz3QS5jw yOlWtU+JU2Y0CTGxhl8GWwUdzFNNahAtBI9C/IoA= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388390AbgEMJ4O (ORCPT ); Wed, 13 May 2020 05:56:14 -0400 Received: from mail.kernel.org ([198.145.29.99]:59804 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388386AbgEMJ4N (ORCPT ); Wed, 13 May 2020 05:56:13 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id AE8BF205ED; Wed, 13 May 2020 09:56:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1589363773; bh=bJcHkarLkEnaA5oi/4+IBchkLnwTvtlhkr1/AqhbjmI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=BxwiibbxgnmM1P3aMAEV2CxKLEyeroT8qlgosQ/BgQnpxn8diaWFVe5iE/IVCF2Ns SsQAKmi73dT9wVXgKuJSVOGOUGS8dxhPHAmuLE/Mi4E+tCJxNtWyQJr3J5cQFkBDt0 8tLwj+vevFe4yBC9ZSNFrarT5En8ei3U3thHVkr0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Vince Weaver , Dave Jones , Steven Rostedt , Vegard Nossum , Joe Mario , Miroslav Benes , Josh Poimboeuf , Ingo Molnar , Andy Lutomirski , Jann Horn , Peter Zijlstra , Thomas Gleixner Subject: [PATCH 5.6 110/118] objtool: Fix stack offset tracking for indirect CFAs Date: Wed, 13 May 2020 11:45:29 +0200 Message-Id: <20200513094427.700814552@linuxfoundation.org> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20200513094417.618129545@linuxfoundation.org> References: <20200513094417.618129545@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Josh Poimboeuf commit d8dd25a461e4eec7190cb9d66616aceacc5110ad upstream. When the current frame address (CFA) is stored on the stack (i.e., cfa->base == CFI_SP_INDIRECT), objtool neglects to adjust the stack offset when there are subsequent pushes or pops. This results in bad ORC data at the end of the ENTER_IRQ_STACK macro, when it puts the previous stack pointer on the stack and does a subsequent push. This fixes the following unwinder warning: WARNING: can't dereference registers at 00000000f0a6bdba for ip interrupt_entry+0x9f/0xa0 Fixes: 627fce14809b ("objtool: Add ORC unwind table generation") Reported-by: Vince Weaver Reported-by: Dave Jones Reported-by: Steven Rostedt Reported-by: Vegard Nossum Reported-by: Joe Mario Reviewed-by: Miroslav Benes Signed-off-by: Josh Poimboeuf Signed-off-by: Ingo Molnar Cc: Andy Lutomirski Cc: Jann Horn Cc: Peter Zijlstra Cc: Thomas Gleixner Link: https://lore.kernel.org/r/853d5d691b29e250333332f09b8e27410b2d9924.1587808742.git.jpoimboe@redhat.com Signed-off-by: Greg Kroah-Hartman --- tools/objtool/check.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/tools/objtool/check.c +++ b/tools/objtool/check.c @@ -1403,7 +1403,7 @@ static int update_insn_state_regs(struct struct cfi_reg *cfa = &state->cfa; struct stack_op *op = &insn->stack_op; - if (cfa->base != CFI_SP) + if (cfa->base != CFI_SP && cfa->base != CFI_SP_INDIRECT) return 0; /* push */